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Preparation and characterization of mesoporous mixed oxide catalyst La-Co-Zr-O
其他题名介孔混合氧化物催化剂La2Co2Zr2O 的制备与表征
Zou, ZQ; Meng, M; Zha, YQ; Xie, YN; Hu, TD; Liu, T; Xie YN(谢亚宁); Hu TD(胡天斗); Liu T(刘涛)
2006
发表期刊CHINESE JOURNAL OF CATALYSIS
卷号27期号:2页码:#REF!
通讯作者Zou, ZQ (reprint author), Tianjin Univ, Dept Catalysis Sci & Technol, Sch Chem Engn, Tianjin 300072, Peoples R China.
文章类型Article
摘要The mixed/complex oxide catalysts prepared by the normal co-precipitation method possess low surface area, poor component dispersion, and wide pore size distribution. In this work, the method for the Si-Al zeolite synthesis was used for reference to prepare the La-Co-Zr-O ((La + Co)/(La + Co + Zr) atomic ratio was 0.5) mixed oxide catalysts with large surface area and narrow pore size distribution. Cetyl trimethyl ammonium bromide (CTAB), p-octyl polyethylene glycol phenyl ether (OP), and their mixture were used as the templates, respectively. N-2 adsorption, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), extended X-ray absorption fine structure (EXAFS) spectroscopy, and temperature-programmed reduction (H-2-TPR) were employed to characterize the catalysts. The N-2 adsorption results show that the obtained samples possess large specific surface area (96.6 similar to 117.6 m(2)/g) and uniform pore diameter (3.5 similar to 4.3 nm). The results of XRD, XPS, and Co K-edge EXAFS indicate that the highly dispersed Co3O4 crystallite (23 similar to 33 nm) is the main active phase for CO oxidation. Compared with the catalyst prepared by co-precipitation method, the samples prepared by citric acid complexation-organic template decomposition method have much higher component dispersion and catalytic activity. The H-2-TPR results reveal that the Co3O4 phase in the sample prepared using mixed templates of CTAB and OP is easier to be reduced, which is relevant to the catalyst activity for CO oxidation.
关键词mesoporous material lanthanum oxide cobalt oxide zirconium oxide carbon monoxide catalytic oxidation cetyl trimethyl ammonium bromide p-octyl polyethylene glycol phenyl ether
学科领域Chemistry; Engineering
收录类别SCI
WOS类目Chemistry, Applied ; Chemistry, Physical ; Engineering, Chemical
WOS记录号WOS:000235990300009
引用统计
被引频次:1[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/226368
专题多学科研究中心
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GB/T 7714
Zou, ZQ,Meng, M,Zha, YQ,et al. Preparation and characterization of mesoporous mixed oxide catalyst La-Co-Zr-O[J]. CHINESE JOURNAL OF CATALYSIS,2006,27(2):#REF!.
APA Zou, ZQ.,Meng, M.,Zha, YQ.,Xie, YN.,Hu, TD.,...&刘涛.(2006).Preparation and characterization of mesoporous mixed oxide catalyst La-Co-Zr-O.CHINESE JOURNAL OF CATALYSIS,27(2),#REF!.
MLA Zou, ZQ,et al."Preparation and characterization of mesoporous mixed oxide catalyst La-Co-Zr-O".CHINESE JOURNAL OF CATALYSIS 27.2(2006):#REF!.
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